Device for applying films of coating material to paper webs



y 1941- L PARKINSON 2,243,604

I DEVICE FOR APPLYING FILMS 0F CQATING MATERlFAL To PAPER WEBS Filed May 5, 1959 4 Sheets-Sheet 1 InVEn'tUr' /0 LFar'Kxnsqn 'ZI/I/Z y 1941- r PARKINSON 2 0 DEVICE FOR APPLYING FILMS OF COATING MATERIAL- TO PAPER WEBS Filed May 5, 1939 4 Sheets-Sheet 2 a m uT w 3 &

Inventmr' LFarKxnsnn FI-tt nil-11:55 Y

ay 27, 1941- L. PARKINSON 2 4 DEVICE FOR APPLYING FILMS OF COATING MATERIAL TO PAPER WEBS Filed May 5, 1939 4 Sheets-Sheet 3 23 Invent 131" LFar-K 11151311.

fittmfnegs May'27, 1941.

DEVICE FOR APPLYING FILMS OF COATING MATERIAL TO PAPER WEBS' Filed May 5, 1939 Inven'tur' L.FEPKI1'1EDI1 Eng 5 F1 Ltm 1-- 11:21 15 L. PARKINSON- 2,243,604

4 Sheets-Sheet :4

Patented May 27, 1941 UNITED STATES PATENT OFFICE- 2,243,; nnvrcs-roa amma nuns or coa'rmc mmur. 'ro rum wnns Leonard Parkinson, Park Falls, Wis.

Application my 5, 1939, Serial No. sums 8 Claima. This invention appertains to a novel mechanism for applying a desired coating to one or both sides of a paper web as the same travels through or leaves a Fourdrinier machine or press. One of-the primary objects of the invention is to'provide means for applying ins, fluid condition to either side'or both sides of the paper web at the couch roll or any press of the paper machine, mineral coating materials or pigments, such as clay, gypsum, talc, chalk, or titanium dioxide; adhesives or binding agents, such as starch, casein, silicates, or gums; pigment colors, or analine dyestufisrplastics or cellulose films; waterproofing agents, such as wax; either singly or in combination as a color, slip or slurry, for the purpose of improving the surface, texture, finish, color, opacity, printing quality, or any other desirable feature that may be obtained by the addition of a coating.

Another object of my invention is the provision of novel means for insuring the applying of an even film of a coating material to the paper web, whichconsists in the use ,of asmoothing and leveling roll for engaging the riding roll, which is in constant contact with the paper sheet or web, with a pick-up roll for applying the coatin: to the riding roll.

Another salient object or myQinventioh the I provision of means for removing excess coatingmaterial from the leveling arid smoothing roll by the use of a scraper or doctor blade e ag said roll, means being employed for catching and returning the excess coating from .the leveling and smoothing roll to the color pan or reservoir.

A further object of my invention is the provision of means for controlling the amount of the coating material applied to the paper web,- which consists in the provision of means for adjusting the position orcontact of'the pick -up'roll. relative to the riding roll, and the position of the leveling and smoothing roll relative to the riding A further important object of my invention is to provide novel means for driving the rolls,

4 whereby the same will be driven in a correct manner and at the proper speed and direction relative to one another.

A still further object of my invention is to provide novel means for adjustably moimting all of the rolls on a-irame and for mounting the frame in a novel manner relative to the paper machine, so that the position of the riding roll relative to the couch roll or paper web can be readily controlled.

with these and other objects in view, the invention consists in-the novel construction, arrangement, and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawings, inwhich drawings:

. Figure 1 is a diagrammatic view illustrating the arrangement of my novel coating-applicator relative to the paper web and couch roll of a Fourdrinier machine. Figure 2 is a side elevational view of my improved applicator unit, showing the same arranged above the couch roll of a Fourdrinier machine.

Figure 3 is a top plan view of my improved applicator. v

Figure 4 is a longitudinal sectional view taken substantially on the line Hot Figure 3, looking in the direction of the arrows, illustrating the means for adjustably positioning the pick-=up roll and the leveling and smoothing roll relative to Figure 5 is an enlarged, fragmentary, trans verse, sectional view taken on the line 5-5 of Figure ,4, looking in the direction of the arrows,

illustrating the means iorholding the-bearing roithe pick-up roll in an adjusted position.

Figure 6 is a view similar to Figure 5, but

taken on the line H of Figure4, looking in the direction ofthe arrows, illustrating the means for holding the bearing for the pick-up roll in an adjusted position.

Figure 7 is an enlarged, fragmentary, transverse, sectional view taken on the line |--1 of Fi ure 3, looking in the direction of, the arrows, illustrating the means for rockably mounting th carriage for supporting the various rolis.

Figure 8 is an enlarged, transverse, sectional in detail, wherein similar reference characters designate correspending parts throughout the severalviews, the letter A'generally indicates my novel coating ape plicator,andtbes'ameis adapted-tobe applied asa'unit atthe-desiredpoint onaFourdrinier machineoranyotherapproprlatepapermachine. The unit is preferably ed at the rear end couch roll ll thereof. 1

As illustrated, the Pourdrinier 'wire over the couch roll, and the paper web It leaves the Fourdrinier machine at the couch roll and is porting frame II, which can include longltudi ll travels g a 2,130,004 of a l 'ourdrinier machine 1" directly above the and the pressure of the engagement of the riding roll with the paper w can be regulated.

Adiustably mounted on the carriage on opposite sides of the riding roll 28 are the pick-up roll ll and-the smoothing and leveling roll ll. As will be noted, the pick-up roll I! rotates in the raervoir tank I! and'is of a less diameter than the riding roll II, but of a greater diameter than the smoothing and leveling roll ll. The smoothing and leveling roll II is arranged betweenthe riding roll 28 and thepan II.

nally extending, spaced, parallel beams Is, and

thesebeamsareadaptedtobebolted,asat II, to an appropriate part I. of a Fourdrinier or other paper mflehine. One endofthebeams It has secured thereto a U-shapedsupporting bar l1, and this bar carries the color pan 1!. While I have referred to the pan It at a *colorpan,

. itistobeunderstoodthatthispancanreceive anydesiredtypeofcoatingmateriahssspeciil cally set forth in the-objects of the invention. The opposite ends of .the bar II are connected by a cross-strap II, and this cross-strap ll, in turn, receives and supports a pan 2| for receiving excess material, as will be later set forth.

As heretofore stated, one of the features of the invention is the provision of means for removing excess material and for returning the excess material to the pan or reservoir ll. Hence, the pan 2iisconnectedtothepanlIbymeansofare-- turn pipe 22. I

Mounted within the supporting frame II is the carriage 28 for carrying the various operating parts of my novel coating applicator. The carriage 2: includes a pair of spaced, parallel, longitudinally extending channel beams It, and the inner faces of these beams have bolted or welded thereto angle irom 2| or similar structural steel the angle irom ll interme members.

Rigidly secured to diatetheirendsisapairoftransveraelyalined bearings ll, rotatably receive the ends of One of the important features of the device isthatthecentersofthethreerollsareona common horizontal axis, and their faces are in more or less intimate contact with each other through adjustable b'ea'rings, as will be later set forth. The faces of the rolls 1! and "may be ofhardrubber'orsmoothpolishedmetaLandthe face of the riding roll 28 is preferably formed of medium to soft rubber.

The ends of the shaft it for the pick-up roll 31 are rotatabLv mounted in bearing blocks ll, and these blocks can be shifted back and forth on the carriage through the'medium of tumbuckles 42, and these turnbuckles engage threaded bores formed in the carriers for thebearing,

blocks and stationary webs on the angle beams 26.

Thus, by turning the members 41, the roll ll can be shifted toward and away from the riding roll, and after the position of the pick-up rollll relatlvetothe ridingroll llhasbeensehthe lngblocksllandthesebearingblocksfltare mounted up n slide blocks 1. The slide blocks 41 canbe guided intheirslldingmovementby- 6 guide rails ll securely fastened to theangle bars II. If desired, the longitudinal edgesof theslide a shaft 21 of the riding roll'fl. This ridingroll tlisad'aptedtoengagethepaperwebprefer ablydirectlyabovetheoouchioll II.

In order that the riding roll will engage the paper web with the desired and appropriate pres-' sure, the channel beams 2'4 carry at their inner ends outwardly extending, transversely alined stub shafts II, and these stub shafts are rockably mounted in bearings 80 mounted upon the beams It oftheframe II. Theouterendsofthebeams It of the frame ll carry brackets ti, through which extend tension bolta'll. These tension bolts loosely. extend through the upper flanges of the channel beams 14, and the bolts can have placed thereon wedge-shaped washers 38, which washers'can be interposed between the heads of the bolts and the inner faces of the upper flanges of the channel beams 24. The tension bolts u extend through the brackets It, and the bolts can be raised and lowered by means of nuts 84 threaded on the upper ends thereof. Expansion springs are coiled about the bolts and engage 7 Obvio sl byadjusting the nuts It and ti. position of the roll 88 relative to. the paper Wt!) blocks '41 can be beveled, and the mating faces 'of the guide rails can be similarlybeveled. The.-

bearing blocks it a'reconnected with their slide blocks 41 through the medium of bolts 4.. Pastened to the slide blocks l'l'are adjustable tension rods ",and theserodsextend throughwebs lion the'angle bars ll. Tension springs I! are placed upon the tensionrods I. on opposite sides of the webs'li, and adjustingnuts II are threaded on the rods is en aging the opposite ends of the tension 'springs II, and, obviously, by turning the nuts IS, the position of the roll a relative tothe roll 28 canbevaried.

From the description so far, it can be seen that the carriage "swings toward the paper web, so that the riding roll 20 will engage'the paper web with the desired pressure. The pick- The tank 2! carries a scraper or doctor blade 5|, which engages the roll 38, and, hence, excess coating material is removed from the roll 88 and is delivered to'the pan 2|. This excess material, as stated, is returned to the color or reservoir pan is.

Whiletherollscanberotatedinany appropri- .My driving means includes an electric motor 55 of the desired rating, and the riding roll ahas keyed or otherwise secured to itsshaft, a pulley 56, around which is trained a pulley belt 51. This pulleybeltis,inturn,trainedabouta pulley wheel ,58 keyed or otherwise secured to the armature shaft of the motor. The opposite end of the shaft 21 of the pick-up roll 28 from the pulley wheel 56 has keyed or otherwise secured thereto a pair of sprocket wheels 59 and 60. The sprocket wheel 59 is in alinement'with a relatively small sprocket wheel 6| keyed-to the shaft 39 of the pick-up roll 31, and with an idle sprocket wheel 62 carried by a stub shaft 3 mounted upon one of the angle bars 25. A sprocket chain 64 is trained about the sprocket wheel 59 and extends over the sprocket wheel, and one run of the chain is trained under the sprocket wheel SI of the riding roll 31. Thus, the roll 31 also rotates in a direction opposite to the riding roll 28, and picks up the material in the pen I! in an efllcient manner and carries the same to said riding roll.

Th sprocket wheel 60 is in longitudinal altnement with a relatively small sprocket wheel 65 It extends under a sprocket wheel carried by the pick-up roll II, and this sprocket chain is trained over an idle sprocket wheel. The smoothing and leveling roll 12 is driven directly from the riding roll ll through the medium of a sprocket chain, which is trained over a sprocket wheel carried by the roll II and a sprocket wheel carried by the roll 12.

From the foregoing description it can be seen that I have provided a novel and simple device for ionisin a film of a desired coating material to a paper web, as the same leaves the paper machine.

Changes in details may be made without departing from the spirit or the scope of my invention, but what I claim as new is:

- 1. In a device for applying a film of coating material to an endless paper web, comprising a (see Figure 3), and a sprocket chain ii connects the sprocket wheels GI and 65 together for driving the smoothing and leveling roll "in a reverse direction from the roll.

In Figures 1 to 8 inclusive, I haveshown my novel device utilized for applying a film of the desired coating material to one side only of a paper web. In Figure 9, I have illustrated means for applying a him of a desired coating material to both sides of a paper web simultaneously. In .this figure, the paper web is indicated by the reference character W, and the upper applicator is of exactly the same type as shown 1 and described in Figures 1 to 8 inclusive. The coating applicator for the lower face of the paper web W is indicated by the letter L, and is also of exactly the same character as the appli-.

cator shown and described in Figures-l to 8 inclusive. Hence, the lower applicator L includes a-riding roll 10 for engaging the lower face of the paper web W directly below the point of engagement of the. upper riding roll wlth-the upper face of the paper web. The opposite sides of the riding roll 10 are engaged respectively by the pick-up roll 'II and the smooth g nd levelingroll 12. The pick-up roll carries the'coatin material to the riding roll II from a reservoir pan 1:, and excess material is'taken off the smoothing and leveling roll I! by a doctor blade 14. which is carried by a pan I5. They-lower riding roll for enga in the paper web, a reser'voir pan for the coating material, a pick-up roll rotating in said pan and engaging one side of the'riding roll, a smoothing and lev'eling roll n gin the opposite side of the riding roll and rotating in the same directionas said riding r'oll, an excess coating material-receiving pan, a doc- .tor blade carried by the last-mentioned pan for engaging the smoothing and leveling roll for taking excess materialoff said smoothing and leveling roll, and conveying the same to said lastmentioned pan, and means for conducting excess material collected from said last-mentioned pan to the reservoir pan.

2. A device for applying a coating of material -mally' engaging said web,pick-up roll on the carriage for applying coating material to the riding roll, a smoothing'and leveling roll on the carriage, and means for adjusting the pick-up ,a carriage rockably connected at its inner end to the supporting frame, means adjustably and resiliently supporting the outer end of the carriage from the supporting frame, a riding roll on the carriage, a pick-up roll for the coating material on the carriage engaging the riding roll, and a smoothing and leveling roll on the carriage engaging the riding roll.

4. A device for applying a coating to a web of material comprising; a rigidly supported frame, a carriage rockably connected at its inner end to the supporting frame, means adjustably and resiliently supporting the outer end of the roll, and a smoothing and leveling roll on the carriage engaging the -riding roll, the pick-up roll and the smoothing and leveling roll being adjustably mounted on the carriage for varying the positions thereof relative to the riding roll. 5. A unitary device for connection with a paper'machine for applying a coating of desired material directly to the paper web of the paper machine comprising, asupporting frame adapted to be rigidly connected to the paper machine, a carriage. rockably mounted on the I V supporting, frame, means adjustably and resiliriage, a pick-up roll for the coating material mounted upon the carriage and mi lin one side, or the applying roll, and a smoothing and leveling mll engaging the opposite side the riding roll and mounted upon said carriage. I 6. A unitary device for connection with a paper machine ior applying a coating of desired material directly to the P per web of the paper machine comprising, a supporting frame adapted to be rigidly connected to mi im machine, a carriage rockably mounted on the supporting frame, means adjustably andresiliently supportingtheouterendoi'thecarriage,acoating- *i'or coating material secured to the frame, an

excess material-receiving pan secured to the .i'rame. a carriage rockably mountedat its inner' endontheirammmeansadjustablyandresili entlysupportingtheouterendotthecarriage.

aridingrollrotatablymoimted onthe carriage for winging the paper web, a pick-up roll rotatably mounted onthe carriageandmountedin the reservoir tank and engaging one side 0! the riding roll, a smoothing and leveling roll rotatably carried bythe carriage and engaging the opposite side of the riding roll, a doctor blade carried by the excess material-receiving pan engaging the smoothing and leveling roll. and means for conducting material from the excess material-receiving pan to the reservoir tank.

8. A unitary device for connection with a papermschineiorapplyinganlmoicoatingto the paper web leaving the machine comprising, a frame rigidly connected to the machine a carriage rockably supported at its inner end on the irame, means sdjustably and resiliently supporting the outer end of the carriage. a riding roll rotatably carried by the carriage for engaging the paper weh, a pick-up roll for the coating material rotatably mounted on the carriage engaging, one side of the riding roll, a smoothing and leveling roll rotatably mounted onthecarriageengl in theothersideotthe riding roll, a motor on said frame, means tor driving the riding roll mm the motor, and means for rotating the pick-up roll in an opposite direction from the riding roll and the smoothing and leveling roll in the same direction as the riding roll. s LIOHABD PARKINSON. 

